MFC r179971: In case of interface initialization failure remove struct in_ifaddr* from in_ifaddrhashtbl in in_ifinit because error handler in in_control removes entries only for AF_INET addresses. If in_ifinit is called for the cloned inteface that has just been created its address family is not AF_INET and therefor LIST_REMOVE is not called for respective LIST_INSERT_HEAD and freed entries remain in in_ifaddrhashtbl and lead to memory corruption.
MFC r179971:
In case of interface initialization failure remove struct in_ifaddr* from
in_ifaddrhashtbl in in_ifinit because error handler in in_control removes
entries only for AF_INET addresses. If in_ifinit is called for the cloned
inteface that has just been created its address family is not AF_INET and
therefor LIST_REMOVE is not called for respective LIST_INSERT_HEAD and
freed entries remain in in_ifaddrhashtbl and lead to memory corruption.

PR:		kern/124384
MFC after:	3 weeks

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase